Force on a Current Carrying Conductor in Magnetic Field Video Lecture | Science Class 10

in this video we'll talk about the force
on a current carrying conductor in a
magnetic field a magnetic field is
produced due to the flow of an electric
current through a conductor a force is
exerted by this magnetic field on a
magnet which is placed in the
surroundings of the conductor according
to a French scientist Andre Marie ampere
an equal and opposite force is exerted
by the magnet on the current carrying
conductor let's go through an activity
to demonstrate the force which is caused
due to the magnetic field acting on the
current carrying conductor we need a
small aluminium rod ay B having length
about 5 centimeters suspend it
horizontally on a stand using two
connecting wires as shown take a
horseshoe magnet and place it in such a
way that the rod lies in between the two
poles of the magnet with the magnetic
field directed upwards the north pole
has to be vertically below and the South
Pole has to be vertically above the
aluminum rod in series connect the
aluminum rod with a battery key and
rheostat now let the current pass
through the aluminum rod from B to a we
will notice that the rod moves towards
the left direction on reversing the flow
current we will observe that the rod
moves towards the right through this
activity the conclusion can be made that
when a current carrying aluminum rod is
placed in a magnetic field force is
exerted on it
it can also be concluded that the
direction of force is reversed when the
flow of current is reversed if the poles
are interchanged the direction of force
acting on the current carrying conductor
gets reversed this shows that the
direction of the force on the conductor
depends upon the direction of the
current and the magnetic field when the
direction of the current is at a right
angle to the direction of the field the
magnitude of force is at the highest in
such a condition we can use a simple
rule to find the direction of force on
the conductor in this activity the
direction of the current and the
magnetic field are considered to be
perpendicular to each other and from
this it can be found that the force is
also perpendicular to both of them the
Fleming's left hand rule helps us to
illustrate the direction of force acting
on the conductor magnetic field and the
current in a simple manner according to
this rule stretch the thumb index finger
and middle finger of your left hand such
that they are perpendicular to each
other if the index finger shows the
direction of the magnetic field then the
middle fingers shows the direction of
the current and the thumb shows the
direction of the force acting on the
conductor electric motors electric
generators loudspeakers microphones and
measuring instruments are a few examples
of devices that used current-carrying
conductors and magnetic field